You mean, mix up comments with posts, or posts where the user has commented even though not being the author, with his own posts ? Or maybe better: a dedicated dropdown populated with comments by the user: "My Post Comments", etc...?

In fact, the more I look at WPS Blog Post, the more I see it with the ability to deal with any custom post type... As many dropdowns as the admin wishes, just click and add that dropdown. A significant rework but worth the price.